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%I #12 Apr 27 2022 19:48:37
%S 0,1,21,421,13421,323421,12023421,241023421,10321023421,211421023421,
%T 4233421023421,140223421023421,3310023421023421,121201023421023421,
%U 2424021023421023421,104030421023421023421,2131113421023421023421,43122323421023421023421,1413002023421023421023421
%N Decimal repunits written in base 5.
%F a(n) = A007091(A002275(n)).
%o (PARI) a(n) = fromdigits(digits((10^n-1)/9, 5));
%Y Cf. A002275, A291962, A353142, A353143, A353145, A353146, A353147, A353148.
%Y Cf. A003463, A007091.
%K nonn,base,easy
%O 0,3
%A _Seiichi Manyama_, Apr 26 2022
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